Invoicing Basics
Practical guides on invoicing basics — clear writing for freelancers and small-business owners.
9 articles
- 01Invoicing BasicsJul 29, 2026
How to Bill Clients for Expenses: Reimbursable Expenses on Invoices
How to recharge travel, materials, software and subcontractor costs to clients, whether to add markup, and how VAT and sales-tax rules apply.
8 min read - 02Invoicing BasicsJul 27, 2026
What Is Progress Billing? How to Invoice a Project in Stages
A practical guide to milestone and staged invoicing for freelancers and contractors, covering deposits, progress claims, retainage, and sample wording.
8 min read - 03Invoicing BasicsJun 29, 2026
How to Invoice Someone as an Individual (Without a Company)
You don't need a registered company to send a legal invoice. Here's exactly what to put on it, how to get paid, and the tax basics in the US, UK, Canada, and Australia.
8 min read - 04Invoicing BasicsJun 18, 2026
How to Write an Invoice: A Step-by-Step Guide (2026)
Step-by-step guide to writing an invoice: required fields, line items, tax, payment terms, and the mistakes that cause late payments. Free templates included.
10 min read - 05Invoicing BasicsJun 16, 2026
Invoicing as a Sole Trader: What to Include & How to Get Paid
You don't need a limited company to send an invoice. What a sole trader's invoice must show, how tax works, the records to keep, and the habits that get you paid on time.
10 min read - 06Invoicing BasicsMay 25, 2026
Invoice Numbering: Best Practices & Systems
How to number your invoices correctly: sequential systems, date-based formats, prefix conventions, legal requirements by country, and mistakes that trigger audits.
9 min read - 07Invoicing BasicsMay 21, 2026
How to Invoice International Clients (Currency, Tax & Getting Paid)
Practical guide to cross-border invoicing: choosing currencies, handling FX fees, VAT reverse charge, W-8BEN forms, payment methods, and avoiding costly mistakes.
12 min read - 08Invoicing BasicsMay 17, 2026
How to Send an Invoice (Email Templates & Best Practices)
Step-by-step guide to sending invoices by email, including copy-paste email templates, subject line formulas, attachment tips, and follow-up sequences.
10 min read - 09Invoicing BasicsMay 7, 2026
How to Invoice as a Freelancer (Complete Guide)
Everything freelancers need to know about invoicing: what to include, how to set rates, payment terms, tax obligations, and getting paid on time.
11 min read